Yea this isn't going to happen soon. I remember when the first "final" boss in coil dropped into duty finder: First coil, turn 5, Twintania. Yea, that was....interesting.

Well ok, yes you could duty finder it back in the day. You had to be on a JP server though. It's not something that actually happens in the west. Not for the current content anyway.

You could make a party finder for A4S though! I'm sure you'll think its a interesting fight. I wouldn't expect to beat it though. Even with echo and new gear. It's still one of the hardest fights in the game (aside from the current savage). It hasn't been long enough to become irrelevant yet like the others. I mean, I'm talking about myself trying to do it in party finder. I don't think I'd beat it in there. Maybe someone other than me would have better luck doing it with random people. I know I'm not that fortunate.